Tether will track secondary transactions with USDT. Who will be affected? Tether will track USDT transactions on the secondary market using the power of Chainalysis. Chainalysis' tools will give Tether "a deeper degree of oversight of the USDT market." The key components of the new system are monitoring of sanctioned wallets and categorization of stablecoin holders, making it possible to identify users of exchanges or trading platforms on the darknet. In December 2023, Tether froze 41 cryptocurrency wallets that were allegedly associated with individuals on the US Treasury Department's sanctions list. Last year, the company assisted the Department of Justice, the US Secret Service and the Federal Bureau of Investigation (FBI) in freezing 326 wallets containing USDT stablecoins worth a total of $435 million.